const Mock = require('mockjs');
const { param2Obj } = require('./utils');

const user = require('./data/user');
const table = require('./data/table');

const mocks = [...user, ...table];

// for front mock
// please use it cautiously, it will redefine XMLHttpRequest,
// which will cause many of your third-party libraries to be invalidated(like progress event).
function mockXHR() {
  // mock patch
  // https://github.com/nuysoft/Mock/issues/300
  Mock.XHR.prototype.proxy_send = Mock.XHR.prototype.send;
  Mock.XHR.prototype.send = function send(...args) {
    if (this.custom.xhr) {
      this.custom.xhr.withCredentials = this.withCredentials || false;

      if (this.responseType) {
        this.custom.xhr.responseType = this.responseType;
      }
    }
    this.proxy_send(...args);
  };

  function XHR2ExpressReqWrap(respond) {
    return function callback(options) {
      let result = null;
      if (respond instanceof Function) {
        const { body, type, url } = options;
        // https://expressjs.com/en/4x/api.html#req
        result = respond({
          method: type,
          body: JSON.parse(body),
          query: param2Obj(url)
        });
      } else {
        result = respond;
      }
      return Mock.mock(result);
    };
  }
  mocks.forEach((i) => {
    Mock.mock(new RegExp(i.url), i.type || 'get', XHR2ExpressReqWrap(i.response));
  });
}

module.exports = {
  mocks,
  mockXHR
};
